Engine Builders-KB356 Piston Milling

Small Block Mopar Engine

  1. MOPAROFFICIAL

    MOPAROFFICIAL FABO Gold Member FABO Gold Member

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    Good.
    Once you cc it, you'll know.
    Based on what you said and considering the quench head milled off down to the dish 'adding a guesstimate of 3cc'

    Screenshot_20210407-151941_Samsung Internet.jpg
     
  2. Brooks James

    Brooks James Dustoff

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    I don’t understand the 114 lsa part, please enlighten me
     
  3. yellow rose

    yellow rose Overnight Sensation FABO Gold Member

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    LSA is part of overlap. The better the cylinder head, the higher the compression ratio the less overlap you need.

    Splitting the duration and opening up the LSA to get the power curve to hang on past peak or at least the same peak power will kill power in the middle every time.
     
  4. MOPAROFFICIAL

    MOPAROFFICIAL FABO Gold Member FABO Gold Member

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    More visual guidance

    20210408_164617.jpg

    20210408_164634.jpg

    20210408_164550.jpg
     
  5. 33IMP

    33IMP Well-Known Member

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    Not just the quench pad gone then, looks like the whole built up area under the q-pad is gone on the op's pistons.... if i had to guess, it has lost at least a half point, probably more. But until you have actual measurements, its just that....a guess.
     
    Last edited: Apr 8, 2021
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    • thomasfouraker

      thomasfouraker Well-Known Member

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      Yea whoever built this motor milled it completely flat to the opposing crown of the piston.
       
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      • MOPAROFFICIAL

        MOPAROFFICIAL FABO Gold Member FABO Gold Member

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        Those in the pic... I have already milled .045 off the pads...

        I'm sure it's around 8.1.
         
      • thomasfouraker

        thomasfouraker Well-Known Member

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        Sounds like it’s calling for boost.
         
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        • 33IMP

          33IMP Well-Known Member

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          Yep. Time to mount up the powerdyne or the Kenne-Bell!
          I havent run any numbers, but.... with that much of the piston gone, and being .080+ in the hole....i think mopar official is right, low 8s.
          Still... measure and calculate. If you want to use the blower, you may want to juggle numbers with head gasket thickness. Big difference between .020 steel shim and .080 cometics. (You dont have any quench to lose either way)
           
          Last edited: Apr 8, 2021
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